74221216 has 12 divisors (see below), whose sum is σ = 146123082. Its totient is φ = 37110592.

The previous prime is 74221177. The next prime is 74221219. The reversal of 74221216 is 61212247.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 1971216 = 8500^2 + 1404^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (74221219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159675 + ... + 1159738.

Almost surely, 2^74221216 is an apocalyptic number.

It is an amenable number.

74221216 is a deficient number, since it is larger than the sum of its proper divisors (71901866).

74221216 is a wasteful number, since it uses less digits than its factorization.

74221216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319423 (or 2319415 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 74221216 is about 8615.1735908222. The cubic root of 74221216 is about 420.2515801879.

The spelling of 74221216 in words is "seventy-four million, two hundred twenty-one thousand, two hundred sixteen".